Page 188 - IGUS Linear

drylin R shaft guides | Design standards drylin R shaft guides | Installation instructions
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Floating bearings for linear plain bearings Eccentric forces drylin R shaft guides are designed for completely lubrication-free operation. The dimensions
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drylin 03 series linear plain bearings off er great advantages To ensure successful use of maintenance-free drylin linear of the respective linear adapter and housing meet the standard for recirculating ball bearings.
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in applications with parallel shafts. With their geometry, they bearings, it is necessary to follow certain recommendations: During assembly, please note the following installation instructions:
are able to compensate for alignment and parallelism errors if the distance between the driving force point and the fixed Design tips for drylin linear plain bearings: Recommended tolerance for the shaft: h6-h10
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and should be used on the shaft located furthest from the bearings is more than twice the bearing spacing (2:1 rule), The mentioned values for "Fmax." relate to the performance of Surface roughness [Ra]: 0.15-0.6
drive mechanism. The design provides a spherical area a static friction value of 0.25 can theoretically result in the iglidur liners made from high-performance plastics and Guide shafts round/supported u Shafts page 263
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on the outside diameter of the aluminium adapter for self- jamming on the guides. cannot be used as the only selection tool for the calculation of
alignment. Reductions in load capacity are prevented, since This principle applies regardless of the value of the load an application. The maximum carrying capacity of the entire Recommended housing hole H7
the shaft always lies on the total projected surface. Due or drive force. The friction product is always related to the bearing system depends on the geometry, housing shape, the Linear plain bearings RJUM-01/03, TJUM-01/03, RJM,
to the even load distribution over the entire bearing, edge fixed bearings. The greater the distance between the drive housing material, the connection including the screws used and RJMP, RJ260(U)M02, press-fit bearings WLM, WLFM
pressure is not possible with the self-aligning drylin linear and the guide bearing, the higher the wear and required requires a separate inspection. For a detailed analysis, please
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bearings. In order to compensate parallelism errors between drive force. use our online configurator at
two shafts, the outer diameter is designed to be smaller than Failure to observe the 2:1 rule during a use of linear plain u www.igus-asean.com/drylin-expert
the housing hole diameter by 0.2 to 0.3mm (depending on bearings can result in uneven motion or even system
the size). With the use of mounted O-rings, these bearings blockage. Such situations can often be remedied with
have an elastic bearing seat. The clearance between the relatively simple modifications. If you have any questions on
bearing and housing allows for the maximum compensation design and/or assembly, please make use of our technical
of possible shaft miss-alignment. support.
The drylin R self-aligning bearings are supplied hard-
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anodised. These surfaces guarantee the highest wear
resistance if the aluminium bearing moves in the housing
during compensation adjustments. Another option are the Floating Fixed bearing 2 x Liners: Press-fit bearings: Linear plain bearings: Solid plastic bearings:
pillow blocks in the OJUM-06 LL and RJUM-06 LL design bearing _UM-01, _UMO-01, _UM-11, WLM, WLFM RJUM-01, RJUM-11, RJUM- RJM, RJI-01
series. The mounting of the bearing allows a parallelism _UMO-11, _UM-02 ● Press-fit installation into the ES, TJUM-01, RJUM-03, ● Fastening with circlips
● Interlocking with the housing
according to DIN 471 or 472
TJUM-03, RJUI-01, RJUI-03,
H7 housing hole u Assembly
adjustment between the shafts by ±3mm. The particular bore ● Locating spigot is instructions, www.igus-asean. TJUI-01, TJUI-03 (not included) ● The E9 inner
● Secured by DIN 471 or
tolerance applies only after the
supported by a snap ring
suspension of the supporting housing on an axis running groove ● Anti-rotation feature com/WLM 472 circlips, metric types (not press-fit
in the z-direction enables an angular error compensation through engagement of the pin included)
in hole Ø z
of up to 3.5°. 1x

Figure 03: The 2:1 rule
Solid plastic bearings: Linear plain bearings: Compact bearings: Linear plain bearings:
RJMP RJUM-02 RJ260 (UM-02) OJUM-01, OJUM-03, OJUI-01,
● Easy assembly by soft press- ● Secured by press-fit in steel ● Locating spigot and press-fit OJUI-03
fit ● Secured by DIN 471 or 472 housing hole H7 or aluminium into housing bore H7 ● Adapter secured with set
circlips (not included) housing hole K7 ● Alternatively, the adapter can screws (not included)
● Alternatively, the adapter be glued with commercially
can be glued with commercially available 2-component adhesive
available 2-component adhesive into a housing
into a housing

RJUM-06-LL OJUM-06-LL
u Page 236 u Page 237

RJUM-03/OJUM-03 series ±0.5°
Diagram 02: By defined installation clearance and RJUM-06-LL/OJUM-06-LL series ±3.5°
externally mounted O-rings, the self-aligning drylin R Table 04: Compensation of misalignment errors Quad blocks: RQA, RGA Linear housings: Quad blocks: OQA, OGA, Pillow blocks: RJUM/E/T-05,
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bearings of the type series 03 can compensate Tandem design: RTA RGAS Linear housings: OGAS, RJUM-06/-LL, OJUM/E-06/-LL,
parallelism errors. The spherical drylin adapter can RJUM-03/OJUM-03 series ±0.1mm ● The bearing in the housing ● The bearing in the housing is Tandem design: OTA Flange housings: FJUM/T-01/02;
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Quad blocks: RGA, OGA;
● The bearings is secured by
secured by DIN 471 circlips
is secured by DIN 472 circlips
compensate for parallelism errors. A hard-anodisation RJUM-06-LL/OJUM-06-LL series ±3.0mm screws Tandem designs: RTA, OTA;
Linear bearings: RGAS, OGAS
protects the aluminium adapter from wear. Table 05: Compensation of parallelism errors ASEAN 09/2023 ASEAN 09/2023 ● Mounting screws of the
housing DIN 912-8.8 ● Circlips
according to DIN 7980
186 Online tools and more information u www.igus-asean.com/drylinR 3D CAD files, prices and delivery time online u www.igus-asean.com/drylinR 187